Quasi-Periodic Solutions of Nonlinear Wa
β Massimiliano Berti, Philippe Bolle
π Library
π
2021
π European Mathematical Society
π English
Many partial differential equations (PDEs) arising in physics, such as the nonlinear wave equation and the SchrΓΆdinger equation, can be viewed as infinite-dimensional Hamiltonian systems. In the last thirty years, several existence results of time quasi-periodic solutions have been proved adopting a